Improvement in combined engine and pump valves



3 Sheets--Sheet 1.

L. Lusen.. Combined Engine and Pum No. 152,237.

p Valves. Patent June 23,1874.

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UNITED STATES PATENT C11-Trono ARTHUR J. L. LORETZ, OF NEWT BRUNSVIOK, NEVVJERSY. ASSIGNOR OF ONE-HALF HIS RlGHT TO NORMAN HUBBARD, OF BROOKLYN, N. Y.

IMPROVEMENT lN COMBINED ENGINE AND PUMP VALVES.

Specifiiation forming part of Lett-ers Patent No. 4152,237., dated June 23, 1874; application tiled i December 29, 1873.

To all whom it may concern Be it known that I, ARTHUR J. L. LoRn'rz, of New Brunswick, in the county of Middlesex and State of New Jersey, have invented a Combined Engine and Pump for Direct-Acting Steam-Pumps, of which the following is a specification My invention relates to a class of engines and pumps known as the direct-acting kind, where the steam-valve is operated by steam, and the water-valves in the pump replaced by one slide-valve; and consists in the combination of devices more fully hereinafter set forth.

In my invention the steam-motor for operating the pump-valves is located in the steamcylinder valve-chest, and also acts in combination with the main steam-valve as a positive motor for the induction and eduction of the steam in the steam-cylinder, the movement necessary for placing the auxiliary ports in position for operating the auxiliary motor by steam being derived from a combination, viz The previo us movementofth e main steam-val v e and the application of motion to the connection between the steam-motor and water-valve from the motion of the pistons occasioned by the admission and emission of steam in main cylinder by the main steam-valve 5 the auxiliary valve being formed by an arrangement of ports in the main steam-valve, and a connecting portion of the auxiliary pistons placed at each end of the main steam-valve passing through the center ofthe main steam-valve.

Figure l is a side elevation, representing the steam-valve and steam-cylinder, watervalve and water-cylinder in section, showing the whole pump complete, with pistons of both cylinders at thc end of their course, and both valves in their proper position for the return stroke. Fig. 2 represents an enlarged section ofthe steam-valves, showing all the steam and exhaust ports of the main valve and auxiliary motor in position for the return stroke, immediately after the piston arrives at the end of its stroke, as in Fig. l. Fig. 3 represents the same as Fig. 2, but at a time when the piston has nearly arrived at the end of the return stroke, the tappet attached to the main pistonrod .having struck with its upper part the colla-r attached to the valve stem or rod connecting the two pistons,thereby brin ging the ports ofthe latter over or under those in the main 4 valve; Fig. et shows an outside view of one of the auxiliary pistons. Fig. 5 represents the same as Figs. 2 and 3, but at a time when the piston has arrived at the end of the return stroke, thus showing the valve in position for the forward stroke. Fig. 6 is a cross-section through'the center vof Figs. 2, 3, or 5. Fig. 7 represents a side view of the watervalve chest, showing the openings on the side for the purpose of removing the valve. Fig. S represents an end view of f the same. Fig. 9 represents the bonnets for covering the openings on' the sides of the water-valve chest, they being provided with openings, to which the eduction-pipes are attached.

Similar letters of reference indicate similar parts.

YReferring to the above-named gures, the

`operation of the engine and pump is as follows: The pistons B and l), being both connected on the same rod C C', having arrived at the end of their course toward the heads G and g, and thetappet D, attached to the rod O', having previously acted against the collar d2 on the stem e, to which the arm l1 of the stem E is attached, willv have 'drawn the auxiliary pistons C D toward the head T2 of the steam-chamber A, bringing the steam-ports V P and exhaust-ports V2 R2 over and under each other, thereby allowing the steam to enter from the semicircular chamber M, through ports N2 P2 P3P, and through V, into the space between head Tl and piston C, forcing the latter ahead and pushing the valve B forward toward head T2, the steam for supplying the piston C from chamber M entering iirst by way of ports N2, P2, P3, and V, and then through N, P, and V; the exhaust steam from the other piston, D, or space between D and T2, passing first through ports V2 in and around the space between the main valve BV and piston D to ports R2 R1 U' to main exhaust O3, and then through ports V2in and around the same space to port R2 U2 to main exhaust O3. The space between valve B and pistons C D always is kept in equilibrium by connecting-port R3. The valve B is thus pushed forward by the action or" -the steam on piston C until the piston D strikes the head T2, when the main valve B will be in proper position for the rcturnstroke, as represented by Figs. 1 and 2. The steam then enters the chest A from the steam-pipe S into the semicircular chamber M; then passes through ports N 2, Figs. 1 and 2, in and around the groove X2 of the valve B; then into port O2, entering the cylinder between piston B and head G', and driving the piston toward head F, the exhaust passing out from the space between F and B through port O1 in the groove X of valve B, and from thence to main exhaust-port O3. Again, while the valve-stem c was moved by the tappet D acting against thc collar d2, thereby changing the ports in the auxiliary pistons for the purpose of throwing the main valve over, the collar t' on the stem e in the water-cylinder chest W, Fig'. 1, has moved toward the water-valve h, taking up the lost motion which is left between the two collars I and J and valve h, thus not moving the valve until the steam acts upon the main valve, changing the steam and water valves both at the same time. The water enters the cylinder a between the piston b and head g, through induction-port m3, valve h, and port m2, Figs. 1, 7, and 8, and forces the water between piston b and head f, through port m1 and past valve h, into waterchest W, and from thence through the openings S in the plates Z, the water-chest being provided with stufiing-boxes t1 and t2 for valvestem e; also having an opening, K, in the top communicating with the air-chamber n, Figs. 1, 7, 8, and 9. Now, referring to Figs. 1, 2, 3, and 5, when the piston B1 of the steam-cylinder A arrives toward the end of its course toward head F, the tappet D on the rod C will strike with its upper part the collar and arm d', moving the stem e toward the steamcylinder, taking up the lost motion which exists between the collars 'i' j and valve h in the water-cylinder W, bringing the latter collar close up to the valve. At the same time the arm d, fast to the stem E, has brought the pistons C D in the position as represented by Fig. 3, bringing the ports V2 P2 in communication with each other; also port V communicating with the space between valve B and pistou C. The steam enters the former, V2, through P2, and passes into the space between the piston D and head T2, forcing the valve B over, as represented in Fig. 5, the exhaust between piston C and vhead T1 passing o' through port V in and around space between C andB; then first into port R2 R2 U2 into main exhaust-port O3, and then through R U1 to main exhaustport O3 in cylinder A, Fig. 1. The piston D, while pushing the main steam-valve B, also pulls the water-valve h over, thus placing all the valves (steam and water) at the same time in proper position for another forward stroke, and so vice versa.

Having explained my invention, what 1 claim as new, and desire to secure by Letters Patent, is

1. The combination of valve B, provided with ports P1 P2 P2 R1 R2 R3 with the pistons C D, provided with ports V1 V2, and steamchest, provided with ports U1, U2, and O2, substantially as described.

2. The valve-chest A, with its ports N1 N2 in chamber M, ports U1 U2 connecting with main exhaust-port O3, in combination with valve B, having auxiliary ports P1 P2 l?3 and R1 R2 R3, and auxiliary pistons C D with their ports V1 V2 and connecting-stem E', al1 arranged for operation as and for the purpose set forth.

3. The combination of valve B, provided with ports P1 P2 123 R1 R2 R3, and the pistons C D with ports V1 V2, and the steam chest, provided with ports U1, U2, and O3, and stem F e, and valve k in water chest, al1 substantially as and for the purpose herein described.

ARTHUR J. L. LORETZ.

Witnesses:

THos. D. CARPENTER, Jr., A. ALLER,'Jr. 

